CN106143115A - Electric automobile and in-wheel motor drive system - Google Patents
Electric automobile and in-wheel motor drive system Download PDFInfo
- Publication number
- CN106143115A CN106143115A CN201510127877.1A CN201510127877A CN106143115A CN 106143115 A CN106143115 A CN 106143115A CN 201510127877 A CN201510127877 A CN 201510127877A CN 106143115 A CN106143115 A CN 106143115A
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- Prior art keywords
- decelerator
- chamber
- drive system
- motor drive
- motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The present invention relates to electric automobile and in-wheel motor drive system.In-wheel motor drive system includes the hub side rotary part being connected with wheel hub, the support shaft being connected with vehicle bridge, shell and shell body rear cover, and support shaft couples with hub side rotary part phase.Shell and shell body rear cover limit motor chamber and limit decelerator chamber for installing decelerator for installation motor, shell and support shaft.The in-wheel motor drive system of the present invention also includes pressure equaliser, shell is provided with motor chamber opening and/or decelerator chamber opening, pressure equaliser is communicated with corresponding chamber respectively by motor chamber opening and/or decelerator chamber opening, and gas can pass in and out described corresponding chamber respectively from pressure equaliser.The pressure equaliser of the present invention can temperature change in the course of the work when balance motor chamber and/or the external and internal pressure of decelerator chamber.
Description
Technical field
The present invention relates to electric automobile, particularly to the in-wheel motor drive system of electric automobile.
Background technology
With the development of electric automobile, have been developed over in-wheel motor drive system.In-wheel motor
Drive system is built-in motor in wheel, can be independently controlled each wheel, power
Transmission efficiency and response are all higher, and do not need the parts such as power transmission shaft and differential gearing.Cause
This, in-wheel motor drive system not only makes the vehicle body design free degree be improved, and can add
Big interior space.
Fig. 1 shows an example of the in-wheel motor drive system of prior art.Such as Fig. 1 institute
Showing, in-wheel motor drive system includes the hub side rotary part being connected with wheel hub (not shown)
100 ', the support shaft 200 ' being connected with vehicle bridge (not shown), shell 300 ', and shell body rear cover
400’.Hub side rotary part 100 ' and axletree are permanently connected, and its radially inner side is provided with wheel hub
Bearing (not shown).Support shaft 200 ' couples mutually with hub side rotary part 100 ' and leads to
Crossing decelerator to be connected with the output of rotor, outside it, (left side in figure) is connected to wheel rim
(not shown).Shell 300 ' and shell body rear cover 400 ' limit motor chamber 1 ' for peace
Dress motor, shell 300 ' and support shaft 200 ' limit decelerator chamber 2 ' for installing decelerator,
It is filled with oil for lubrication reducer gear in decelerator chamber 2 '.Shell body rear cover 400 ' and wheel hub
Sidespin rotation member 100 ' also limits space, is used for installing wheel brake.Drive at this in-wheel motor
It in system, between shell 300 ' and support shaft 200 ', is provided with the first decelerator oil sealing 20 ' and
Two decelerator oil sealings 40 ', by motor reducer oil between motor chamber 1 ' and decelerator chamber 2 '
Envelope 50 ' sealing, shell body rear cover 400 ' passes through the first electric engine oil seal 60 ' and the second electric engine oil seal 70 '
It is tightly connected with shell 300 '.In FIG, the second electric engine oil seal 70 ' is O-ring form.
Oil gas in the course of work of above-mentioned in-wheel motor drive system, in decelerator chamber 2 '
Pressure changes due to thermal expansion and shrinkage.For the air pressure in balanced reducer chamber 2 ' to protect
One and second decelerator oil sealing 20 ', 40 ' and motor reducer oil sealing 50 ' not heat fatigue,
Shell 300 ' is upper is provided with the opening communicating with decelerator chamber 2 ', opening near support shaft 200 ' place
It is inside mounted with breather valve 10 '.So, when the air pressure in decelerator chamber 2 ' is owing to temperature raises
When excessive, gas can be discharged to outside by breather valve 10 '.But, when air pressure owing to temperature drops
Low and when reducing, the air pressure in decelerator chamber 2 ' cannot keep balance.
And, under actual condition, in-wheel motor drive system needs to meet the anti-of more than IP6
Water quality standard.In the case, whole wheel will be immersed in water a period of time.When the water surface is high
When ventilation valve 10 ', water can flow in decelerator chamber 2 ', and these will be to the first and second decelerators
Oil sealing 20 ', 40 ' and motor reducer oil sealing 50 ' cause damage and therefore corrode decelerator.
In addition, motor chamber 1 ' is under sealing state all the time, when the temperature increases, motor cavity
The internal pressure of room 1 ' will be above external pressure, thus to the first and second electric engine oil seals 60 ', 70 '
And motor reducer oil sealing 50 ' produces pressure, this forces gas to flow into decelerator chamber 2 ' or stream
To outside, and shorten the first and second electric engine oil seals 60 ', 70 ' and motor reducer oil sealing
The service life of 50 '.On the other hand, when temperature reduces suddenly, the outside pressure of motor chamber 1 '
Power will be above internal pressure, thus to the first and second electric engine oil seals 60 ', 70 ' and decelerating through motor
Device oil sealing 50 ' produces pressure, and this gas that can force outside or water flow into motor chamber 1 ', and
Shorten the service life of the first and second electric engine oil seals 60 ', 70 ' and motor reducer oil sealing 50 '.
All these all in-wheel motor drive system can be caused damage.Accordingly, there exist to improvement
The needs of in-wheel motor drive system.
Content of the invention
In first aspect, the present invention provides a kind of in-wheel motor drive system, including wheel hub sidespin
Rotation member, support shaft, shell and shell body rear cover, hub side rotary part is connected with wheel hub,
Support axle is connected with vehicle bridge, and support shaft couples with hub side rotary part phase.Shell and shell body rear cover
Limit motor chamber for installing motor, shell and support shaft limit decelerator chamber for
Decelerator is installed.Different from the in-wheel motor drive system of the prior art shown in Fig. 1 are,
The in-wheel motor drive system of the present invention also includes pressure equaliser, and shell is provided with motor cavity
Room opening and/or decelerator chamber opening, described pressure equaliser by motor chamber opening and/
Or decelerator chamber opening communicates with corresponding chamber respectively, gas can fill from described pressure balance
Put the corresponding chamber of turnover respectively.
According to the present invention, in addition to motor chamber opening and/or decelerator chamber opening, electricity in wheel
The remainder of machine drive system is all to seal.
Preferably, pressure equaliser is arranged on shell, to keep motor chamber under operating mode
And/or the pressure balance of decelerator chamber.
According to embodiments of the invention, the outer surface of shell is provided with circumferential recess, described pressure
Bascule is assemblied in described circumferential recess.Preferably, described pressure equaliser is by pressure
Bar is fixed in described circumferential recess.
Described pressure equaliser is configured to the hollow structure closed, for example, be similar to bicycle tube
Hollow structure.Preferably, described pressure equaliser is by making shape-changing material, for example by
Flexible rubber material is made.In this way, gas can flow freely into outflow motor chamber and/or
Decelerator chamber.
Preferably, described pressure equaliser is filled with the gas of certain pressure in an initial condition.
Pressure is less than the maximum possible air pressure in motor chamber and decelerator chamber, can be according to decelerator
Thermal expansion from normal temperature to maximum temperature for the gas in chamber and motor chamber determines.
According to embodiments of the invention, described pressure equaliser includes motor pressure separated from one another
Thrust balancing device and decelerator pressure equaliser, its respectively with motor chamber opening and decelerator
Chamber opening communicates.Preferably, described motor pressure bascule and decelerator pressure balance dress
Put and be respectively configured to semi-circular.In this way, motor pressure bascule and decelerator pressure are put down
Weighing apparatus device can individually be designed, and prevents the oil gas in decelerator chamber from flowing into motor chamber.
According to the present invention, motor pressure bascule makes motor chamber constitute a relative closure
Unit, this makes motor chamber be relatively isolated with outside.Equally, decelerator pressure equaliser makes
Decelerator chamber constitute a relative closure unit, this make decelerator chamber relative with outside every
From.And, motor pressure bascule be able to ensure that motor chamber in normal pressure, and not
Temperature in pipe in-wheel motor drive system is raised and lowered.In the case of there is no inside and outside differential pressure,
Compression to electric engine oil seal requires to reduce, and effectively increases the service life of electric engine oil seal.Equally,
Decelerator pressure equaliser be able to ensure that decelerator chamber in normal pressure, but regardless of wheel in
Temperature in motor driven systems is raised and lowered.In the case of there is no inside and outside differential pressure, to subtracting
The compression of speed device oil sealing requires to reduce, and effectively increases the service life of decelerator oil sealing.
Therefore, motor pressure bascule makes motor space (include motor chamber and motor pressure
Bascule) it is relatively isolated with outside, the parts in protection motor chamber are from due to outside corruption
The infringement lost and cause.Equally, decelerator pressure equaliser makes decelerator space (include subtracting
Speed device chamber and decelerator pressure equaliser) it is relatively isolated with outside, protect decelerator chamber
Interior parts are from the infringement causing due to external corrosion.
In second aspect, the present invention provides a kind of electric automobile, and it includes above-mentioned in-wheel motor
Drive system.
The in-wheel motor drive system of the present invention has the following advantages.
1. can be with individually designed motor pressure bascule and decelerator pressure equaliser, effectively
Prevent the oil gas in decelerator chamber from flowing into motor chamber and causing motor corrosion-damaged.
2. motor pressure bascule and decelerator pressure equaliser have taken turns interior electricity without changing
The layout of machine drive system and mounting arrangements, and the axle of in-wheel motor drive system will not be increased
To space.
3. motor pressure bascule and decelerator pressure equaliser simple in construction, low cost,
Easily install and change.
Brief description
Those skilled in the art are by referring to accompanying drawing, by hereafter exemplary embodiment specifically
Bright, it will be apparent that and understand these and other aspects of the invention and advantage.In the drawings:
Fig. 1 is the local of the in-wheel motor drive system without pressure equaliser of prior art
Profile.
Fig. 2 is that the plane of the in-wheel motor drive system with pressure equaliser of the present invention regards
Figure.
Fig. 3 is the profile of the Z2-Z2 line along Fig. 2.
Fig. 4 is the profile of the Z3-Z3 line along Fig. 2.
Reference numerals list
1 ' motor chamber
2 ' decelerator chambers
10 ' breather valves
20 ' first decelerator oil sealings
40 ' second decelerator oil sealings
50 ' motor reducer oil sealings
60 ' first electric engine oil seals
70 ' second electric engine oil seals
100 ' hub side rotary parts
200 ' support shafts
300 ' shells
400 ' shell body rear cover
1 motor chamber
2 decelerator chambers
3 decelerator pressure equalisers
4 motor pressure bascules
5 motor chamber openings
6 decelerator chamber opening
20 first decelerator oil sealings
40 second decelerator oil sealings
50 motor reducer oil sealings
60 first electric engine oil seals
70 second electric engine oil seals
100 hub side rotary parts
200 support shafts
300 shells
400 shell body rear cover
Detailed description of the invention
Below in the detailed description of exemplary embodiment, will describe the present invention's with reference to Fig. 2-4
Each feature and aspect.
Fig. 2 shows in-wheel motor drive system according to embodiments of the present invention, and it has deceleration
Device pressure equaliser 3 and motor pressure bascule 4.Two pressure equalisers 3 and 4 are equal
For the hollow structure being made up of flexible rubber, similar with bicycle tube.Shell 300 sets
Have motor chamber opening 5 and decelerator chamber opening 6, respectively with motor chamber 1 and decelerator chamber
Room 2 communicates.In this example, pressure equaliser 3 and 4 is all configured to semi-circular, shell 300
Outer surface be provided with circumferential recess, for install pressure equaliser 3 and 4.
Fig. 3 shows the profile of the Z2-Z2 line along Fig. 2, illustrated therein is decelerator pressure
Bascule 3.As it is shown on figure 3, in-wheel motor drive system includes and wheel hub (not shown) phase
Hub side rotary part 100 even, the support shaft 200 being connected with vehicle bridge (not shown), shell
300, and shell body rear cover 400.Hub side rotary part 100 and axletree are permanently connected, its footpath
Hub bearing (not shown) is installed to inner side.Support shaft 200 and hub side rotating part
Part 100 phase is coupled and is connected with the output of rotor by decelerator, outside it (in figure
Left side) it is connected to wheel rim (not shown).Shell 300 and shell body rear cover 400 limit electricity
Machine cavity room 1 is for installing motor, and shell 300 and support shaft 200 limit decelerator chamber 2
It for installing decelerator, is filled with oil in decelerator chamber 2 for lubrication reducer gear.
Shell body rear cover 400 and hub side rotary part 100 also limit space, are used for installing wheel brake.
It in this in-wheel motor drive system, between shell 300 and support shaft 200, is provided with first
Decelerator oil sealing 20 and the second decelerator oil sealing 40, between motor chamber 1 and decelerator chamber 2
Being sealed by motor reducer oil sealing 50, shell body rear cover 400 passes through the first electric engine oil seal 60 He
Second electric engine oil seal 70 and shell 300 are tightly connected.In this example, the second electric engine oil seal 70
For O-ring form.
In figure 3, decelerator chamber 2 and decelerator pressure equaliser 3 pass through decelerator chamber
Room opening 6 communicates.Decelerator pressure equaliser 3 guarantees that decelerator chamber 2 is relative with outside
Seal.It in the starting stage, in decelerator pressure equaliser 3, is filled with the gas of certain air pressure,
Air pressure is less than the maximum possible air pressure in decelerator chamber 2 and according to the gas in decelerator chamber 2
Thermal expansion from normal temperature to maximum temperature for the body determines.Temperature in decelerator chamber 2
During rising, the gas in gas hot expanding type, and decelerator chamber 2 flows by decelerator chamber
Room opening 6 arrives decelerator pressure equaliser 3, so that the pressure balance in decelerator chamber 2
(because decelerator pressure equaliser 3 is fabricated from a flexible material, so decelerator pressure balance
The pressure change of device 3 is negligible).On the other hand, when decelerator chamber 2
When interior temperature declines, the gas stream in contraction of gas, and decelerator pressure equaliser 3
Dynamic by decelerator chamber opening 6 to decelerator chamber 2, so that the pressure in decelerator chamber 2
Dynamic balance.
Fig. 4 shows the profile of the Z3-Z3 line along Fig. 2, illustrated therein is motor pressure and puts down
Weighing apparatus device 4.
In the diagram, motor chamber 1 and motor pressure bascule 4 pass through motor chamber opening
5 communicate.Motor pressure bascule 4 guarantees motor chamber 1 and outside opposing seal.It is similar to,
In the starting stage, being filled with the gas of certain air pressure in motor pressure bascule 4, air pressure is less than
Maximum possible air pressure in motor chamber 1 and according to the gas in motor chamber 1 from normal temperature
Determine to the thermal expansion of maximum temperature.When the temperature in motor chamber 1 raises, air heat
Expand, and the gas flowing in motor chamber 1 arrives motor pressure by motor chamber opening 5
Bascule 4, so that the pressure balance in motor chamber 1 is (because of motor pressure bascule
4 are fabricated from a flexible material, so the pressure change of motor pressure bascule 4 is can to ignore not
Meter).On the other hand, when the temperature in motor chamber 1 declines, contraction of gas, and
Gas flowing in motor pressure bascule 4 arrives motor chamber 1 by motor chamber opening 5,
So that the pressure balance in motor chamber 1.
Describe the present invention above with reference to exemplary embodiment.But, by reading and understanding this
The specification and drawings of invention, it may occur to persons skilled in the art that other modification and replacement.Cause
This, the invention is not restricted to embodiments described above, but can be in the scope of claims
In the present invention modified and change.The invention is intended to comprise all these modification and replace
Change, in the range of they each fall within attached claims and equivalent thereof.
Claims (9)
1. an in-wheel motor drive system, including hub side rotary part, support shaft, shell
And fixed component, hub side rotary part is connected with wheel hub, and support shaft is connected with vehicle bridge, supports
Axle couples with hub side rotary part phase, and shell and fixed component limit motor chamber for peace
Dress motor, shell and support shaft restriction decelerator chamber are for installing decelerator, and its feature exists
In in-wheel motor drive system also includes pressure equaliser, and shell is provided with motor chamber and opens
Mouth and/or decelerator chamber opening, described pressure equaliser is by motor chamber opening and/or subtracts
Speed device chamber opening communicates with corresponding chamber respectively, and gas can be from from described pressure equaliser
Pass in and out described corresponding chamber respectively.
2. in-wheel motor drive system according to claim 1, it is characterised in that shell
Outer surface be provided with circumferential recess, described pressure equaliser is assemblied in described circumferential recess.
3. in-wheel motor drive system according to claim 2, it is characterised in that described
Pressure equaliser is fixed in described circumferential recess by press strip.
4. in-wheel motor drive system according to claim 1, it is characterised in that described
Pressure equaliser is configured to the hollow structure closed.
5. in-wheel motor drive system according to claim 1, it is characterised in that described
Pressure equaliser is by can make shape-changing material.
6. in-wheel motor drive system according to claim 4, it is characterised in that described
Pressure equaliser is filled with the gas of certain pressure in an initial condition.
7. the in-wheel motor drive system according to according to any one of claim 1-6, its feature
Being, described pressure equaliser includes motor pressure bascule separated from one another and decelerator
Pressure equaliser, it communicates with motor chamber opening and decelerator chamber opening respectively.
8. in-wheel motor drive system according to claim 7, it is characterised in that described
Motor pressure bascule and decelerator pressure equaliser are respectively configured to semi-circular.
9. an electric automobile, it is characterised in that it includes according to arbitrary in claim 1-8
In-wheel motor drive system described in Xiang.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510127877.1A CN106143115B (en) | 2015-03-23 | 2015-03-23 | Electric automobile and in-wheel motor driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510127877.1A CN106143115B (en) | 2015-03-23 | 2015-03-23 | Electric automobile and in-wheel motor driving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106143115A true CN106143115A (en) | 2016-11-23 |
| CN106143115B CN106143115B (en) | 2021-03-09 |
Family
ID=58064248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510127877.1A Active CN106143115B (en) | 2015-03-23 | 2015-03-23 | Electric automobile and in-wheel motor driving system |
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| CN (1) | CN106143115B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581646A (en) * | 2004-04-09 | 2005-02-16 | 钱梦非 | Brushless through-shaft speed-reducing hub motor |
| CN1806163A (en) * | 2003-05-09 | 2006-07-19 | 克诺尔布莱姆斯轨道系统英国有限公司 | Pressure equalisation device |
| JP2009106024A (en) * | 2007-10-22 | 2009-05-14 | Toyota Motor Corp | Breather device |
| CN102751806A (en) * | 2012-07-19 | 2012-10-24 | 隆鑫通用动力股份有限公司 | Waterproof structure assembly of in-wheel drive motor and electric motorcycle of waterproof structure assembly |
| CN202973029U (en) * | 2012-12-15 | 2013-06-05 | 泰州市锦浩光电科技有限公司 | Device capable of keeping internal pressure of lamp and external pressure of lamp balanced |
| CN103375571A (en) * | 2013-07-04 | 2013-10-30 | 银川威力减速器有限公司 | Venting device for speed reducer |
-
2015
- 2015-03-23 CN CN201510127877.1A patent/CN106143115B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1806163A (en) * | 2003-05-09 | 2006-07-19 | 克诺尔布莱姆斯轨道系统英国有限公司 | Pressure equalisation device |
| CN1581646A (en) * | 2004-04-09 | 2005-02-16 | 钱梦非 | Brushless through-shaft speed-reducing hub motor |
| JP2009106024A (en) * | 2007-10-22 | 2009-05-14 | Toyota Motor Corp | Breather device |
| CN102751806A (en) * | 2012-07-19 | 2012-10-24 | 隆鑫通用动力股份有限公司 | Waterproof structure assembly of in-wheel drive motor and electric motorcycle of waterproof structure assembly |
| CN202973029U (en) * | 2012-12-15 | 2013-06-05 | 泰州市锦浩光电科技有限公司 | Device capable of keeping internal pressure of lamp and external pressure of lamp balanced |
| CN103375571A (en) * | 2013-07-04 | 2013-10-30 | 银川威力减速器有限公司 | Venting device for speed reducer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106143115B (en) | 2021-03-09 |
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